David b



D. B. COX.

Magazine Stove.

Patented April 13, 1869..

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N. PETERS mlo-Liihngnphor. Walhlrbn D. C.

DAVID B. COX, OF

TROY, NEW YORK- Letters Patent No. 88,946, dated April 13, 1869.

BA SE BURNIIiIG srovn.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that 1, DAVID B. Cox, of Troy, in the county of Rensselaer, and State of New York, have invented a new and useful Improvement in Stoves, Furnaces, and Fire-Place Heaters; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification- Figure 1 being a front elevation of a magazine illuminating stove, constructed with my improvement.

Figure 2, a central vertical section of the same, in a plane out from front to rear.

Figure 3, a horizontal section thereof, in a plane indicated by the line 3 y, figs. 1 and 2.

Like letters designate corresponding parts in all of the figures.

My invention consists in a ring, or annular flue around the fire-pot, but separated therefrom by an open space, through which the outside air may circulate, thereby rendering both the inward and outward surface of the flue, and the outer surface of the firepot, heat-radiating and heat-conducting.

The draught is conducted downward from the combustion-chamber, through one or more descending flues, into the annular flue, and thence upward through a flue, or lines, to the smoke-pipe.

This improvement, as represented, is combined with an illuminating magazine stove. But it may be used with stoves without illuminating windows, and without magazines. It is also applicable to furnaces and fireplace heaters.

In the drawings, let

A represent the magazine;

B, the mica Windows;

0, the fire-pot;

D, the base;

E, the combustion-chamber; and

G, the smoke-pipe of anilluminating magazine stove.

The annular flue H surrounds partly or entirely, or is situated outside of the fire-pot, generally near the lower part thereof, although its exact height need not be prescribed.

Two connecting flues I I are represented as leading from the upper part of the fire-pot down into the annular flue, and these near the front part of the stove.

But one or any other convenient number may be used. The position, though preferably near the front.

to insure the most circulation through the annular flue, may be varied, and they may start from any suitable place, or places, in the combustion-chamber, which may be preferred.

The exit-flue, or pipe K, extends upward from the back part of the annular flue to the smoke-pipe.

A damper may control the draught, so as to pass directly out through the smoke-pipe from the combustion-chamber, or first down through the annular flue.

This flue is raised somewhat above the base, D, so as. to afford an open space, a, for the passage of the circulating air inward between the flue and the firepot.

The air after passing upward in contact with the firepot and inward surface of the flue, again flows into the room, through a perforated, or open-work screen 0, which surrounds and conceals the fire-pot, above the annular flue.

The special advantages of this invention are- First, that while a down draught is secured for utilizing a large percentage of the heat, and for radiating a proper proportion of it near the floor, at the same time, the descending flues are so short as not to injuriously retard or obstruct the draught.

Second, a largely increased heat-radiating and conducting surface is obtained, by exposing all the outer surface of the fire-pot, and the entire surface of the annular flue to the air, since the inward surface of the flue imparts its heat by conduction and. radiation to the air circulating between it and the surface of the fire-pot, as well as the outward surface to the surrounding air.

Third, the fire-pot thus exposed to the circulation I of the air, is kept at a comparatively low temperature, and does not burn out so rapidly as when kept at the usual high temperature.

What I claim as my invention, and desire to secure by Letters Patent, is The annular flue H, surrounding, or outside of the fire-pot, and separated therefrom by an open space, through which the air circulates, substantially as and for the purpose herein specified.

' DAVID B. COX. Witnesses:

RICHARD B. CHURCH, HENRY S. CHURCH. 

